The basic concept is, well.. Online Pictionary.
It is one of the many draw/answer apps on the Market, but it is by far the best and most polished one I have played.
It places a notification in the bar to inform you (if you have exited out of the game to do something else) that the game is starting, which is a nice little feature.
Compaired to apps like DrawParty, it is just so much nicer looking graphically..
Oh, its also for ADC2, so if you like it vote the dev up
P.S. I met the dev like 5 mins after the app was released, and he seems like he really wants to keep this app well updated to user requests.